Arch construction.



I. L. MARSH.

ARCH CONSTRUCTION. APPLICATION FILED AUG. 16, 1915.

1,177,257. 7 v Patented Mar.28,1916.

Z SHEETS-SHEET 1.

'1. L. MARSH.-

ARCH CONSTRUCTION. APPLICATION FILED AUG.I6,19I5- 2 SHEETS-SHEET 2.

Int anion 3 130m L. 7770:1577.

Patented Mar. 28,1916.

g PATENT OFFICE.

[IsoM L. MARSH; F nos ANGELES, oamronma, A'ssIGNoR or ONE-HALF T0 JOHNC.

I BURNETT, OF FULLERTON, CALIFORNIA. I

" r citizen of the-United States. residing at Los i av Beit known thatI, Isoi-r L. MAnsH; a

Angeles, in the county' of Los'Angelesand State (it-California, haveinvented newand useful Improvements"-in' Arch Construction, of.whichtlie following is' a specification.

' 'I lns' invention relates to an, arch con- 7 In the ordinaryconstruction of'fire-back struction', "and p'articularly pertains to a lirebackarch forboilers. w

arches for' stationary boilers,'. the. arch is i built" up 'ofniasonrywhich, .when'it is desired to gain acccessjtothei space at therear end of the; l' )Q1lei1,"lS ,usually' .t 0rn' down.

' I' his'jrequircs considerable time and labor,

with waste of lmatci ials and frequently nei videjan arch'const'ru'ctionoftheabove charconsiderableperiod-of time. a

It-is'the object of this invent on to pro;'

actenwhich will'pelmit of ready-access to *the'nace at therear end oftheb'oiler with-- Another-object but demolition otthearch andwhicl'f maybelopcned'and closed within a few moments, with a consequent expenditureof little t me,-

l'abcr and expense,

p, is; to provide afire-back arch-forboilersliaying a firerbrick liningor facing built up in sections and inwhich a' sectilonmay beremovedandreplac'ed when damagedzw'ithout wrecking the arch.-

Anotherlobject is toprovide a metallic support 'having .a pluralityoi'lining memstructed and arranged that the metallic sup hers infire-back arch construction, soconports will not be subjected to thedirect heat beneath thearch. r

Afurther object is to provide a-sectional fire-back arch for boilerswhich is simple in construction and economical-in manufacture and whichmay be readily. applied and substituted forthe arch construction nowgene'rallyin us'e. [The invention primarily residesin pro viding a.inovablelining-supporting bar and producing fire-back tile or brick liningtion being illustrated in the accompanying drawings in which:

Figurelis a view in section and elevation ARCH CONSTRUCTION. 1

I Specification of Letters Patent. Patented 3121i. 28, 1916. n n'caiionfiled August is, 1915. Serial No. 45,675.

illustrating the application ofthe invention: to a statlonary boiler.Fig. 2 isaplan View of the rear end ofaboiler showing the archconstruction as applied; 'Fig. 3 is a detail transrerse 'section throughthe; arch show ing the manner of interlocking adjacent fire- ,backsections. Fig. 4 is a-view of the arch in side elevation. Fig-5 is a'View of same in end elevation." Fig. 6 is aview in'perspective of, anunder-lapping fire-back section. 1 Fig. 7 isa view in perspective of anover-lapping fire-backsection- Fig. 8 is a,' view in vertical sectionshowing the manner of-interlocking the ends of adjacent firebacksections; Fig. 9 isa detail in cross-section showing the. manner. of.interlocking transverse-1y adjacent fire-back sections, and

illustrating the manner in which the fireback sections are removablyattached to their supporting members. Fig. 10 is a viewillustrating amodified: form of connection;

between the fire-bacle' sections and. the sup-- porting member;

More specifically, 12-indicates a stationary boiler which is suitablysupported and has a fire-box l3 formedtherebeneath closed at the sidesby walls 14: and 15 which extend upward alongside of theboiler-12 andconnect with an end wall 16 spaced from'the rear-end 17 of the boiler.The walls 14,15 and lGare usually constructed of masonry; The presentinvention resides in a structure for forming an arch or closure'extending from the end wal1v16 to the rear end 17 I I of the boiler 12to direct heat and products of combustion from a chamber or space 18 infront of the wall 16 through the'fl'ues 19 10f the boiler. Y

In carrying out the invention "the walls 14 and 15 are preferablycarried abore the wall 16, asparticularly shown inFig. 1, to form anabutlnent'for'the arch which extends between the walls 14 and 15.andabuts against the rear end of the boiler 12. In forming the arch, amovable it?) orting-member or bar 20 is provided w 'cii is'here shown as.aicuate in form, one endot whichis adapted .to seat on the wall 16 withits oppositeend abutting against the rear end of the boiler 12 or,against inwardly extending pragmtions on the walls 14 and 15, as shownin Fig.

- The supporting member 20 is preferably formedot cast metal and has:rlaterally projecting portion 21 extending through- Wardly extendingweb 22.-

out length formed with a central upmember has 'a longitudinallyextending" dove-tailed open-ended slot or channel 23 formed on itsinrier arcuate face. This channel is degned to receive dove-tailed ribs24 formed on the upper faces of the lining member 25., or 'sla asparticularly shown in Fig. 9. The lining members 25 are formed of firebrick or similarmaterial aiid. are curved longitudinallyto conform withthe inner face of the supportingimemher 20; a series of .the liningmembers being I i designed to be mounted on the supporting;

member to extend shown in Fig. 4. i i In carrying out the presentinventrom the the length thereof, a

lining membersareprovided in two slightly different shapesas shownin'Figs. 6 and.'7

and herein designated underlapping and 3' overlapping members 26 and 27-respectively. Thelimng members arereetang'ular.

linden-lapping in Figs 4'and 8.; :The lining membersQG are; designed tobe mounted on onesupporting member 20 and the lining members 27 are tobe mounted on adjacent supportingmember, and to, bepositiond'alongsideof the liningf members 26. i

As a means for closing the joint between the adjacent liningmembers, themembers 26 are formed with side fianges30, and members 29' are formedwithflside flanges 31," adapted to extend {over thep'fiange 3 as shownin Fig, 9 pair of supporting mem' iers and the interconnecting liningslabs thereon forming an arch unit which maybe multiplied indefinitelyto form-an arch of any length. i t

The suppbrting members 20 may be pivotall v m ounted so thatthey can beswung.

" back clear of the boiler 12:15 shown in Figs-j 1 and 2. For thispurpose, lugs '32 are formed on the lower 33 formed on a plate 34carried by the wall removable pivot pinsih'i connecting the Hrs 32 and33 to form a hinged joint on which the supporting member 20 may be withhandholes 36 adjacent their upper ends by means of which they may bereadily grasped and swung in or out of 'the operative positii'ips.

In assembling the arch in accordance with this invention. a plate 34'islaid on the wall 16 and has a series of supporting bars 20 pivotallyconmj-cted thereto: a suflicientnumber of the members 20 being providedthat .The supporting rocked into hi retracted: in F,igi1-". If itisdesir I place any "pf the] lining. members, this is readily accomplishedby retracting the sup- "porting member and removing 'one or more ofth'elining sections therefrom, as required.

. shown in may Deconstructed portion of the web'22; which are adapted toextend between lugs,

when the latter are fitted with the lining members, these lining"members ,-will extend across the space between thewalls 14 and 15 at therear end of theboiler. A series of the lining members 26 are thenmounted on the second supporting member 20 from the end; being put inplace by introducing theribs24 on the lining members in theopen end ofthe channel 23 of the support ing member, while the latter is in its re:

tracte'd position, .The supporting member is then swung forward in itsoperative positich.

isithejn placed on the alternate sup orting lining members; and; "placedJ in position "A series of-th'e lining members 26 throughout 1thelength; i of; the arch. The

adjacent p'ortinglmembers 20 are-then providedgwith the lining members,27 and .7

when idis'posedin their forward position,

n "it desired :to gain access sine theglining members- -2'ly .oyerlapthe lining 26,. asparticularly shown i'n'Fig.

spice-beneath thearch. the supporting memher 120 carryingfthe liningmembers?! is I ,Fig. 10,the supporting member20 ositionasshown i toremove .or-reis provided" withlongitudinal. ribs 37 on its l I shown-the formed ,it is manifest that they, of any other form, such,

edgs x'whjich'are adapted to engage overv for instanc'e,"as straight,where a flat'arch is desired. ,By'fdispo'sing the lining .mem-

bers on the inner face/0f the supporting members} the latter are"protected from 'dlrect contact with the heat in the chamber 18. I

and are thuspreventedftromfbeing warped I or burned out. w

From the foregoing, it will be that I have provided fa simple archconstruction removed and replaced without demo the space beneath thearch.

which" can be 1 readily assembled and v tl'partsf.

\ V I ition" of theareh and which facilitates access to 1 30 swungvertically. The webs 22am forined i i While-I have shown thearch asformed with a pluralityof lining members and a single supporting member;it is manifest 'that in some instances, particularly where the span ofthe arch is Ii-ningmemberof the desired len h of small, that 0. single,

span of the 'arch may be. employe It 'is' also obvious that theoverlapping connec;

lab

i0 linin Qnie nb 'f formed in any suitable manner and n some'instancesIfclaim: 1. An arch construction,- comprising apair of supporting 1members, a pivotalmay be dispensed with.

mountin therefor, andapluralityof; .lin-- mem rs slidably connectedtosaidsupporting members with the lining members of 'one'supporting memberoverlapping the ers of the other supporting jmem r. 7 a 2.'A1ia rchconstruction comprising apa'ir of supporting members, a pivotal mountingtherefor, and a plurality ofllining members 15 'detachably connected tosaid supporting? memberswith the linin membersof one supporting memberover upping the lining membersofthe other supporting member,

3. An arch construction. comprising a pair ercuate supporting members,a'jpivotal 'z'w. a

mountin for said members and arcuate lining mem ers' s'lidably anddetachably connected to said supporting member's and so ISOM L. MARSH.

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